Lots of guys named Edward are called Ed for short. For that matter, lots of Albert > Al, Frederick > Fred, Joseph > Joe, etc., etc.
But one thing different about Ed is the way some Eds put a dot after it to show that it’s an abbreviation, writing Ed. so that it looks like an abbreviation for Editor instead of a nickname for Edward.
This used to be done years ago (one example was Ed. Fisher who had a long-running morning radio show on WJW-850 radio in Cleveland in the 1960s). I haven’t noticed it being done lately, although I think I noticed Ed. Norton the actor’s name written with the dot.
Q.: Why the dot? Nicknames aren’t written as abbreviations. And why only Ed.? There used to be more odd abbreviations of names used in the 18th century, when words and names often appeared abbreviated. John was abbreviated Jno. on the Declaration of Independence for no reason that I can fathom. But Ed. is the only example I know where the nickname was written like an abbreviation.